| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5411283 | Journal of Molecular Liquids | 2014 | 6 Pages |
Abstract
An amphiphilic OAPS-PEO was synthesized by “click” reaction between octa(azidopropyl) POSS (OAPS) and propargyl-terminated PEO. The structure of OAPS-PEO was characterized by nuclear magnetic resonance (NMR). The amphiphilic properties and aggregation process of OAPS-PEO in aqueous solution were investigated by fluorescence, dynamic and static light scattering (DLS and SLS), and transmission electron microscopy (TEM). The critical aggregates concentration was determined at ~Â 0.10Â mg/mL using fluorescence measurements. At this concentration, unassociated unimolecular micelles with diameter size of 40-50Â nm were found by DLS, and were also studied by means of TEM. At a lower concentration, all the OAPS-PEO self-assembled into loose balls. With the increase of the OAPS-PEO polymer concentration, OAPS centralizes to be the core of the aggregates. At the concentration of 2.0Â mg/mL, aggregates present to be a core-shell structure.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Yujing Li, Liqiang Wan, Farong Huang, Lei Du,